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Commercial Locksmith Services, Rekeying and Master Key Systems

Commercial locksmith work covers everything from a single worn cylinder to a building-wide master key system with dozens of access levels. Because commercial locks see far more use than residential ones and because turnover of employees and tenants means keys change hands, rekeying and access control come up as often as physical lock repair. A facilities contact typically calls a locksmith either for a lock that has failed mechanically or to manage who holds keys after a personnel change.

If it fails: the first hour

What the site contact should do before the technician arrives.

  1. Do not force the lock or attempt to drill it without a technician
  2. Identify which doors the lost or broken key affects
  3. Restrict access to the area if a master key is confirmed lost
  4. Call for emergency locksmith service and have the lock or key location ready

What fails

Cylinder and pin wearLock cylinders wear internally from thousands of key insertions, eventually sticking, requiring extra force, or failing to turn.
Broken key extractionKeys snap off in worn cylinders, especially with older brass keys that have thinned from repeated use.
Deadbolt and latch misalignmentA door or frame that has shifted slightly throws the deadbolt out of alignment with the strike, so the lock binds or will not fully throw.
Lost key exposureA lost master key or a former employee's unreturned key creates a security gap that only rekeying closes, since a lost key cannot be tracked once it leaves the building.
Master key system complexity creepAd hoc key changes over years without updating the master key chart leave a system where nobody is sure which keys open which doors.
Electronic lock battery and credential failureKeypad and card-access locks fail from dead batteries, worn keypad buttons, or credential database sync issues.
Panic hardware and fire-rated lock conflictsA lock added to a fire door without checking code compatibility can create a life-safety violation even if the lock itself works fine.
Worn or duplicated keysRepeated duplication of duplicates degrades key cutting accuracy, leading to keys that work inconsistently.

What a service call includes

  • Diagnose whether the problem is the cylinder, the alignment, or the key itself
  • Rekey affected locks to invalidate lost or unreturned keys
  • Extract broken keys and repair or replace damaged cylinders
  • Re-align strikes and adjust deadbolts to correct binding
  • Design or update a master key system chart to match current access needs
  • Install or service electronic keypad and card-access locks
  • Cut and issue new keys with a documented distribution record
  • Verify any new hardware installed on fire-rated doors meets code

Preventive checklist

The items a maintenance program should carry for this system. Build a combined checklist across systems with the checklist builder.

Quarterly

  • Test all exterior and high-security locks for smooth operation
  • Reconcile the key holder list against current staff
  • Check electronic lock batteries and credential logs

Annual

  • Full master key system chart review
  • Rekey any locks tied to significant staff turnover
  • Lubricate all cylinders
  • Audit who holds keys to which access levels

What it costs

itemtypical rangewhat moves it
Single lock rekey$50 to $150Price is per cylinder, volume discounts usually apply for multi-door jobs.
Full building rekey$500 to $2,500Scales with door count and lock grade, commercial-grade cylinders cost more than residential.
Master key system design and cut$800 to $3,000Depends on the number of access levels and doors in the system.
Broken key extraction$75 to $150Higher if the cylinder is also damaged and needs replacement.
Electronic lock installation$300 to $900Varies by lock type and whether it integrates with an existing access control system.

National ranges. Local labor, access, after-hours timing and materials move them. Multi-site programs usually price below one-off calls.

When this is an emergency

A lockout at a security-sensitive door, a broken key in an exterior lock, or discovery of a lost master key all count as emergencies.

How to choose a provider

  • Ask whether the locksmith is licensed and bonded for commercial work in the applicable jurisdiction
  • Confirm they can design and document a master key system, not just cut individual keys
  • Ask about turnaround time for a full rekey after a staff separation
  • Get a written key control policy recommendation, including who can authorize duplicates
  • Ask whether they stock high-security cylinders if the building needs restricted keyways

Questions

How often should a building be rekeyed?

There is no fixed schedule, but a rekey after any lost key, unreturned employee key, or significant staff turnover closes the security gap that key alone creates.

What is a master key system?

A hierarchy of keys where a master key opens many doors and individual keys open only their assigned door, letting management control access levels without issuing every key to every person.

Is rekeying cheaper than replacing the lock?

Usually yes. Rekeying changes the internal pins to match a new key while reusing the existing lock hardware, which costs less than a full lock replacement.

Can a locksmith work on electronic and card-access locks?

Many commercial locksmiths service both mechanical and electronic locks, though highly integrated access control systems sometimes require a specialist for the software side.

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